Track-sander.



W. B. ROGERS.

TRACK SANDER.

APPLICATION FILED 0011,1912.

1,074,207, Patented Sept. 30, 1913.

Attorney,

V 1 NESSES INVENTOR m awe/B neural) sanrasrnrnnr curios,

WALTER 13. science, or KNOXVILLE, raimnssnn.

TRACK-SANDER.

Specification of Letters l atent.

Patented Sept. 38, 1913.

Application filed October 1, 1912. Serial No. 723,455.

' ward flow of sand to the air passage ofthe ejector is effectually prevented without the employment of check valves and other moving elements which have atendency to become clogged or choked with sand after a short period of service and thus interfere with the proper operation of the ejector.

A further object of the invention is to providean ejector,the construction of which is such that when air or other fluid under pressure is admitted to the nozzle, any particles of sand which might find lodgment within the nozzle will be automatically discharged, thus rendering the device selfcleaning.

A further object is to provide a nozzle, the ejector of which is provided with a plug having a tortuous circumferential passage formed therein which prevents the sand in the trap from entering the airpassage, and also directs the air in a spiral path to the jet pipe of said nozzle. 7 1

A still furtherobject of'the invention is generally to improve this class of devices so as to'increase their utility, durability and efficiency. 5

Further objects and advantages will appear in the following description, it being understood that various changes inform, proportions and minor details of construc tion may be resorted to within the scope'of the appended claims. 1 i i For a full understanding of the invention and the merits thereof, reference is to be had to the following description and accompanying drawings,in which;

I Figure 1 is a perspective view of a track sanding device constructed in accordance with my invention, Fig, 2 is a longitudinal sectional view of the same, showing the ejector'att-ached to a single sand trap, Fig. 3 is a vertical sectional view taken at right angles to Fig. 2, a portion of'the ejector being shown in elevation. Fig. 4 is a perspective view'of the plug and jet pipe detached.

Corresponding and like parts are referred to in the following description and indicated in all the views of theaccompanying drawings by the same referencecharacters.

The improved sanding'device forming the subject matter of the present invention is shown by way of illustration in connection with a single type of sand trap indicated at 5, said trap being of the ordinary construction and having one side thereof provided with a sand discharge pipe 6 and its bottom formed with an opening for the reception of a threaded clean-out plug '7. The ejector comprises a tubular body portion or nozzle 8 having one end thereof threaded within the trap 5 and its other end eXteriorly threaded at 9 for engagement with a union or coupling 10. Bearingagainst one end of the nozzle 8 and retained in position by the union 10 is a short pipe section 11 having an air passage 12 formed therein which communicates with the interior of the nozzle 8 and through which air or other fluid under pressure is admitted to the nozzle, there being a removable plug 13 threaded in the pipe section 11 to facilitate cleaning the passage 12 when necessary. The passage 12 is tapered in the direction of the nozzle 8 so as to direct the air with sufiicient velocity from the supply pipe 14 to the interior of the nozzle. That portionof the nozzle 8 which enters the sand trap 5 is provided with a conical bore 15 which forms a seat for the correspondingly shaped end 16 of a removable plug indicated at 17. The plug 17 is threaded in the adjacent end of the nozzle 8 and is provided with a longitudinal bore or passage, in which is threaded a jet pipe 18. Formed in the taperedor conical end'16 of the plug is a circumferential groove 19 preferably spiral in shape, one end of said groove merging into orterminating at the flat face 20 of the plug and the other end thereofterminating at the exteriorly threaded portion of the plug, as best shown in "Fig. 4 of the dra'Wim gSm An opening 21 forms a source of communication between the bore of the plug 12 and the circumferential groove 19 to permit the passage of air or other fluid from the pipe 14 to the discharge pipe 6 for the purpose of ejecting the sand from the trap through the pipe 6 to the track. The jet pipe 18 is adl justable longitudinally within the plug 17 so as to vary the amount of sand discharged from the trap, said jet pipe being locked in adjusted position by means of a clamping nut 22. The wall of the tapered portion 16 of the plug bears snugly against the tapered seat 15 in the nozzle 8 so as effectually to prevent sand'from working its way rearwardly into the air passage.

It will here be noted that as the blast of air or other fluid strikes the flat face 20 of the plug, said air will be directed in a spiral path around the plug and thence through the jet pipe to the conductor 6. It will also be noted that by reason of the circumferential groove 19 and the opening 21, any sand which may be forced rearwardly from the sand box by back pressure will be effectually prevented from entering the air passage in the nozzle and clogging or otherwise interfering with the proper operation of the sanding device.

Heretofo-re in devices of this character, check valves and similar moving elements have been employed for preventing the backward flow of sand into the air passage of the nozzle, but as these check valves have a tendency to become clogged or choked with sand after a short period of service they have been found practically useless for this purpose. The present invention provides a structure having no moving parts liable to get out of order, and which will not only effectually prevent the backward movement of the sand into the air passage of the nozzle, but also direct the air in a spiral path to the jet pipe and thus materially increase the cfliciency of the device.

It will here be noted that should any particles of sand be forced rearwardly and find lodgment in the groove 19 or opening 21 in the plug, said sand will be automatically ejected as soon as air or other fluid is ad mitted to the interior of the nozzle, thus rendering the device practically self-cleaning.

l/Vhile the ejector is shown in connection with a sand trap of the single type, it will of course be understood that the device may be used with equally good results in connection with double, triple, or any other type of multiple trap without departing from the spirit'of the invention.

By reason of the threaded connection between the plug 17 and nozzle, said plug may be readily removed from the nozzle to facilitate cleaning thereof if necessary.

What I claim is:

l. A track sander including a sand trap having a discharge passage, a blast nozzle communicating with the interior of the trap, and a hollow plug fitting within the nozzle and having an exterior circumferential groove therein for preventing the sand in the trap from entering said blast nozzle.

2. A track sander including a sand trap. having a discharge passage, a blast nozzle communicatingiwith the interior of the trap, and means disposed within the nozzle for directing the blast in a spiral path through said nozzle to the tip thereof. V

3. A plug for attachment to the blast nozzles of track sanders comprising a body portion having a longitudinal bore and provided with an exterior circumferential groove communicating with the bore of the body portion. 7

4. A track sander including a sand trap having a discharge passage, a blast nozzle communicating with the interior of the trap, and a plug seated in the nozzle and having a longitudinal bore formed therein, there being a circumferential groove formed in one end of the plug and communicating with the interior of the bore.

5. A track sander including a sand trap having a discharge passage, a nozzle communicating with the interior of the trap and 7 having a conical seat formed therein, a plug having one end thereof tapered for engagement with the conical seat of the nozzle and provided with a circumferential groove for preventing the sand in the trap from entering the blast nozzle. V V

6. A track sander including a sand trap having a discharge passage,'a blast nozzle communicating with the interior of the trap,- a plug seated in the nozzle and having a threaded bore, a jet. pipe engaging the threaded bore of the plug and adjustable longitudinally thereof, and a clamping nut engaging the jet pipe and bearing against one end of the plug, the other end of the plug being provided with a circumferential groove communicating with the bore of said plug for preventing the sand in the trap from entering the blast nozzle.

7. A track sander including. a sand trap 7 having a discharge passage, a blast nozzle communicating with the interior of the same trap and having a conical seat formed therein, a plug detachably fitted in the nozzle and provided with a tapered portion en gaging the conical seat of the nozzle, said. plug being formed with a longitudinal bore, a jet pipe seated in said bore, and'means carried by the conical end of the plug for preventing the sand in the trap from entering the blast nozzle. 7 i

S. A track sander including a'sand trap having a discharge passage, a blast nozzle communicating with the interior ofthe trap, a plug seated inthe nozzle, a jet pipe carried by and adjustable longitudinally of the plug, means for locking the jet pipe in different positions of longitudinal adjustment, and means carried by the plug for preventing the entrance of sand from the sand to'the interior of the blast nozzle. V

9. A track sander including a sand trap,

trap

' a nozzle communicating with the interior of 'cal walls of the seat, said the trap, a pipe secured to one end of the nozzle and having a tapered air passage formed therein, a plug seated in the other end of the nozzle and provided with a circumferential passage, and a jet pipe carried by the plug and adjustable longitudinally thereof.

10. A track sander. including a sand trap having a discharge passage, a nozzle secured to and communicating with the interior of the sand trap, said nozzle being provided with a conical seat and having its interior wall adjacent said seat threaded, an exteriorly threaded plug engaging the threaded wall of the nozzle and provided with a'longitudinal bore, a jet pipe engaging the bore and adjustable longitudinally thereof, there being a tortuous passage formed in one end of the plug and communicating with the bore thereof.

11. A track sander including a sand trap having a discharge passage, a blast nozzle communicating with the interior of the sand trap and provided with a conical seat, a plug threaded in the nozzle and provided with a tapered end bearing against the coniplug being provided with a longitudinal bore, a jet pipe engaging the bore of the plug, there being a circumferential formed in the tapered end of the plug, and an opening disposed at an angle to the bore of the plug and forming a source of communication between the groove and said bore.

12. A track sander including a sand trap having a discharge passage, a blast nozzle communicating with the interior of the trap,

spirally disposed grooveand a plug arranged within the nozzle and having one end thereof open and its other end closed, there being a circumferential groove formed in the exterior of the plug and communicating with the open end the blast nozzlesof track sanders comprisingra hollow exteriorly threaded body portion, one end of which is tapered and closed and the other end open, there being a circumferential groove formed in the tapered portion of the body and communicating with the open end thereof.

16. A plug for attachment to the blast nozzles of track sanders comprising a hollow body portion one end of which is closed and the other endopen, there being a circumferential groove formed in the closed portion of the body and communicating with the open end thereof.

In testimony whereof I afiix in presence of two witnesses.

WVALTER B. ROGERS. [L.S.] lVitnesses:

SAMUEL N. AGKER, EUSTAOE C. OWEN.

my signature Copies of this patent may be obtained for five cents each, bx addressing the Commissioner of Patents, Washington, D. C. 

